Sealing and water stopping device at starting portal of rectangular pipe-jacking tunnel

The invention provides a sealing and water stopping device at a starting tunnel portal of a rectangular pipe jacking tunnel, which comprises a tunnel portal frame of a ring body structure, a main body of the tunnel portal frame comprises a pipe body structure, one end of the pipe body structure is p...

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Bibliographische Detailangaben
Hauptverfasser: LIU ZIJIAN, CHEN RENDONG, ZHOU CHANGLIN, GE XIANXUN, BI QIANG, YANG MINGZHE, WU JINGANG, LI JIANLIN, LIU MINGGAO, LIU XIANGYU
Format: Patent
Sprache:chi ; eng
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Beschreibung
Zusammenfassung:The invention provides a sealing and water stopping device at a starting tunnel portal of a rectangular pipe jacking tunnel, which comprises a tunnel portal frame of a ring body structure, a main body of the tunnel portal frame comprises a pipe body structure, one end of the pipe body structure is provided with an inner edge body towards the inner side, and a ring groove is formed between the inner edge body and the inner wall of the pipe body structure; the sealing assembly comprises an annular air bag and a flexible sealing ring, the annular air bag and the flexible sealing ring are both installed in the tunnel portal frame, the flexible sealing ring is detachably installed at one end of the annular air bag, the other end of the annular air bag is installed in the annular groove, and the rectangular jacking pipe passes through a channel formed by the annular air bag and the flexible sealing ring. According to the sealing device, in the advancing process of the jacking pipe, the protrusion of the annular air